Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53566#.VMnUDizQrzE Author(s)    Paipai Pan 1 , Guoyue Chen 2 , Kazuki Saruta 2 , Yuki Terata 2   Affiliation(s) 1 Graduate School of Systems Science and Technology, Integrated Course of Systems Science and Technology, Akita Prefectural University, Yurihonjo City, Japan . 2 Department of Electronics and Information Systems, Akita Prefectural University, Yurihonjo City, Japan . ABSTRACT In the present work, a new snow cover detection method based on visible red and blue bands from MODIS imagery data is proposed for Akita prefecture under the sunny cloud-free conditions. Before the snow cover detection, the MODIS imagery of the study area is pre-processed by geographic correction, clipping, atmospheric correction and topographic correction. Snow cover detection is carried out by applying the reflectance similarities of snow and other substances in t...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53299#.VLydg8nQrzE Author(s)    Lazar Mohammed 1 , Aliou Diongue 2 , Jeng-Tze Yang 3 , Doumandji-Mitiche Bahia 4 , Lecoq Michel 5   Affiliation(s) 1 Institut National de la Protection des Végétaux, Alger, Algérie . 2 United Nations World Food Programme, Dakar, Sénégal . 3 National Chung-Hsing University, Taichung, Chinese Taipei . 4 Ecole Nationale Supérieure Agronomique, Alger, Algérie . 5 CIRAD, Montpellier, France . ABSTRACT In the southern Algerian Sahara, populations of the desert locust have been monitored during the past 43 years. On a limited study area, the use of remote sensing data from Landsat 7 ETM+ and Terra MODIS, coupled with the locust population database, allowed the identification and mapping of solitary desert locust breeding areas during remission periods. These sites are mainly located in wadis and in areas of accumulation/spre...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=47223#.VFwy2mfHRK0 Author(s) Reginald R. Muskett Affiliation(s) Geophysical Institute, University of Alaska Fairbanks, Fairbanks, USA . ABSTRACT Arctic nighttime land-surface temperatures derived by the Moderate Resolution Imaging Spectroradiometer (MODIS) sensors onboard the NASA Terra and Aqua satellites are investigated. We use the local equator crossing times of 22:30 and 01:30, respectively, in the analysis of changes, trends and variations on the Arctic region and within 120° sectors. We show increases in the number of days above 0°C and significant increase trends over their decadal periods of March 2000 through 2010 (MODIS Te...